# US 12,763,455 B2 · Antenna system and base station antenna feeder system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,455 B2 - Document ID: US12763455B2 - Status: Granted - Kind: B2 - Application number: 18/621,837 - Filed: 2024-03-29 - Published: 2024-08-22 - Granted: 2026-10-13 - Earliest claimed: 2021-09-30 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Weihong Xiao; Zhiqiang Liao; He Cui; Jianping Li - Web page: https://patentgrep.com/patent/US12763455B2 ## CPC - H01Q 1/246: {specially adapted for base stations} - H01Q 1/42: Housings not intimately mechanically associated with radiating elements, e.g. radome - H01Q 1/526: {Electromagnetic shields} - H01Q 3/30: varying the {relative} phase {between the radiating elements of an array (H01Q3/2605, H01Q3/2658, H01Q3/2682, H01Q3/44 take precedence)} - H01Q 5/42: using two or more imbricated arrays (H01Q5/49 takes precedence) - H01Q 15/0013: {said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective} - H01Q 21/26: Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An antenna system and a base station antenna feeder system are provided. The antenna system includes a first frequency band radiation element array, a frequency selective surface, a second frequency band radiation element, and a phase shifter. The frequency selective surface is configured to reflect a signal of the first frequency band radiation element array and to transmit a signal of the second frequency band radiation element array. The phase shifter is connected to the first frequency band radiation element array and is configured to feed the first frequency band radiation element array. The phase shifter includes a cavity which is disposed at an edge of the frequency selective surface, a first extension direction of the cavity being consistent with a second extension direction of the first frequency band radiation element array. ## Claims ### Claim 1 An antenna system, comprising: a frequency selective surface; a first frequency band radiation element array; a second frequency band radiation element array; and a phase shifter, wherein: the frequency selective surface is disposed between the first frequency band radiation element array and the second frequency band radiation element array and is configured to reflect a signal of the first frequency band radiation element array and transmit a signal of the second frequency band radiation element array, wherein: the first frequency band radiation element array is disposed in a first radome having a first mounting structure connectable to an external structure; the second frequency band radiation element array is disposed in a second radome; and the first radome is connected to the second radome, the first frequency band radiation element array and the second frequency band radiation element array being arranged in a stacked manner; and the phase shifter comprises a cavity disposed at an edge of the frequency selective surface and a phase shift circuit disposed at the cavity, the cavity being configured to form a ground layer of the phase shift circuit, and a first extension direction of the cavity is consistent with a second extension direction of the first frequency band radiation element array. ### Claim 2 (depends on 1) The antenna system according to claim 1, wherein: the frequency selective surface comprises a first side edge and a second side edge; the phase shifter comprises a first phase shifter and a second phase shifter; the cavity comprises a first cavity and a second cavity, wherein the first phase shifter includes the first cavity and the second phase shifter includes the second cavity, the first cavity of the first phase shifter is disposed at the first side edge and the second cavity of the second phase shifter is disposed at the second side edge; and the first frequency band radiation element array comprises a first array and a second array, the first phase shifter being connected to the first array and the second phase shifter being connected to the second array. ### Claim 3 (depends on 1) The antenna system according to claim 1, wherein: the first frequency band radiation element array comprises: a radiation element having a first balun comprising a first outer conductor and a first inner conductor; and a first radiation arm and a second radiation arm that are co-polarized, the first outer conductor is connected to the first radiation arm and the cavity, wherein: the first inner conductor is connected to the second radiation arm and to the phase shift circuit. ### Claim 4 (depends on 3) The antenna system according to claim 3, wherein an included angle between the first balun and the frequency selective surface is an acute angle. ### Claim 5 (depends on 1) The antenna system according to claim 1, further comprising a reflection plate disposed on a side of the second frequency band radiation element array positioned away from the frequency selective surface. ### Claim 6 (depends on 1) The antenna system according to claim 1, wherein a length of the cavity in the first extension direction is greater than or equal to a length of the first frequency band radiation element array in the second extension direction. ### Claim 7 (depends on 1) The antenna system according to claim 1, wherein the first frequency band radiation element array is a passive radiation element array. ### Claim 8 (depends on 1) The antenna system according to claim 1, wherein a frequency band of the first frequency band radiation element array is less than a frequency band of the second frequency band radiation element array. ### Claim 9 (depends on 1) The antenna system according to claim 1, wherein each of the first frequency radiation element array and the second frequency radiation element array includes a radiation surface disposed parallel to the frequency selective surface. ### Claim 10 (depends on 1) The antenna system according to claim 1, wherein a projection of the first frequency band radiation element array on the frequency selective surface is located on the frequency selective surface. ### Claim 11 (depends on 1) The antenna system according to claim 1, wherein: the second radome having a second mounting structure, and the second mounting structure is connectable to the external structure. ### Claim 12 (depends on 1) The antenna system according to claim 1, further comprising: a third frequency band radiation element array, the first frequency band radiation element array and the third frequency band radiation element array are located on a same side of the frequency selective surface. ### Claim 13 (depends on 1) The antenna system according to claim 1, further comprising: a third frequency band radiation element array, the first frequency band radiation element array and the third frequency band radiation element array being located on a same side of the frequency selective surface; and the third frequency band radiation element array is disposed in the first radome. ### Claim 14 (depends on 1) The antenna system according to claim 1, further comprising: a fourth frequency band radiation element array, the second frequency band radiation element array and the fourth frequency band radiation element array being located on a same side of the frequency selective surface. ### Claim 15 (depends on 1) The antenna system according to claim 1, further comprising: a fourth frequency band radiation element array, the second frequency band radiation element array and the fourth frequency band radiation element array being located on a same side of the frequency selective surface, the fourth frequency band radiation element array being disposed in a third radome, the third radome being provided with a third mounting structure connectable to the external structure. ### Claim 16 (depends on 1) The antenna system according to claim 1, further comprising: a fourth frequency band radiation element array, the second frequency band radiation element array and the fourth frequency band radiation element array being located on a same side of the frequency selective surface, the fourth frequency band radiation element array being disposed in a third radome connectable to the first radome. ### Claim 17 (depends on 1) The antenna system according to claim 1, wherein: a radiation element of the first frequency band radiation element array includes a first balun, the first balun is electrically connected to the phase shifter and the first balun is connected to the frequency selective surface. ### Claim 18 A base station antenna feeder system, comprising: an antenna system comprising: a frequency selective surface; a first frequency band radiation element array; a second frequency band radiation element array; and a phase shifter, wherein: the frequency selective surface is disposed between the first frequency band radiation element array and the second frequency band radiation element array and is configured to reflect a signal of the first frequency band radiation element array and to transmit a signal of the second frequency band radiation element array, wherein: the first frequency band radiation element array is disposed in a first radome having a first mounting structure connectable to an external structure; the second frequency band radiation element array is disposed in a second radome; and the first radome is connected to the second radome, the first frequency band radiation element array and the second frequency band radiation element array being arranged in a stacked manner; and the phase shifter comprises a cavity disposed at an edge of the frequency selective surface and a phase shift circuit disposed at the cavity, a first extension direction of the cavity being consistent with a second extension direction of the first frequency band radiation element array. ### Claim 19 (depends on 18) The base station antenna feeder system according to claim 18, wherein: the frequency selective surface comprises a first side edge and a second side edge; and the phase shifter comprises a first phase shifter and a second phase shifter; the cavity comprises a first cavity and a second cavity, wherein the first phase shifter includes the first cavity and the second phase shifter includes the second cavity, the first cavity of the first phase shifter is disposed at the first side edge and the second cavity of the second phase shifter is disposed at the second side edge; and the first frequency band radiation element array comprises a first array and a second array, the first phase shifter being connected to the first array and the second phase shifter being connected to the second array. ### Claim 20 (depends on 18) The base station antenna feeder system according to claim 18, wherein: a radiation element of the first frequency band radiation element array comprises a first balun having a first outer conductor and a first inner conductor; and the radiation element of the first frequency band radiation element array comprises a first radiation arm and a second radiation arm that are co-polarized, wherein the first outer conductor is connected to the first radiation arm and to the cavity, and the first inner conductor is connected to the second radiation arm and to the phase shift circuit. ### Claim 21 (depends on 18) The base station antenna feeder system according to claim 18, wherein: a radiation element of the first frequency band radiation element array includes a first balun, the first balun is electrically connected to the phase shifter, and the first balun is connected to the frequency selective surface.